Japanese A4 Waygu Sirloin Steak (Frozen, 250g)Sirloin refers to the rear portion of the cows loin, near the tail. As this area experiences less muscle movement, it typically contains rich fat content. High grade Wagyu from this cut often displays beautiful marbling. The texture is tender, and the melted fat during cooking releases a sweet, savory flavormaking it one of the most popular cuts of beef.